Agilent Technologies E3630A manuale d’uso

DUA L OUTPUT POWER SUPP L Y A gi lent MO DEL E3630A OPERA TING A ND SER VICE MA NUAL FOR INSTRUMENTS WITH SERIA L NUMBERS KR85014528 A ND A BOVE For instruments with Serial Numbers above KR85014528, a change page may be included . Manual Part No. 5959-5329 I April 2000 Edition 7[...]

1-2 SA FETY SUMMARY The following general safety prec autions must be observed during all phases of oper ation, service, and repair of this instrumen t. Failure to com ply with thes e precautions or with spec ific warnings elsewhere in this manual v iolates safety standards of des ign , manufacture, and intended use of the inst rument. A gilent T e[...]

1-3 T able of Contents SA FETY SUMM A RY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 GENERA L INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 INTRODUCTIO N . . . . . . . . . . . . . . [...]

1-4 GENERAL INFORMATION IN TRO DU CTI ON This section contains general i nformation concerning the E3630A triple output pow er supply. Included are safety con- siderations, safety and EM C requirements, inst rument and manual ident ification, option and ac cessory inf ormation, instrument descript ion, and specifications. SAFETY CONSIDER A TI ONS T[...]

1-5 mode. In this mode the voltage of the negative output can be set lower than that of the positive output. T he tracking ratio control allows the negative supply 's output to be set to any va lue between a max imum that is within ±5% of the positive supply 's output and a minimum that is less than 0.5 volts. Once a ratio is estab lishe[...]

1-6 INST A LLA TION INITIA L INSPE CTION Before s hipment, this instrument w as inspected and found t o be free of mecha nical and e lectrical defects. As soon as the instrument is unpacked, inspect for any dam age that may have occurred in t ransit. Sav e all packing m aterials until the inspection is com pleted. If damage is found, a c laim shoul[...]

1-7 Before applying power to the supply , check the label on the heat sink t o mak e certain that the supply's line voltage option agrees wit h the line voltage to be used . If the opti on does not correspond to your line voltage, refer to paragraph "LI NE VOL T AG E OPTION CONVERSIO N" in the service section before applying power. T[...]

1-8 Figure 3. Current Limit Characteristic of the 6V Supply this region. If the line voltage is maintained in the up per end of the input voltage range, howev er , the supply pr obably w ill operate within its specifications Connecting Load Each load should be connected t o the power supp ly output terminals using separate pairs of connect ing wire[...]

1-9 Figure 4. Rev ers e Cur rent L oading S olution[...]

A-1 SERVICE INFORMA TION Figure A- 1. Blo ck Di agram PRINCIPLES OF OP ERA TION (Blo ck Diagr am Over view) This sect ion presents t he principles of operation of t he E3630A Triple Out put Power S upply . T hroughout this discus- sion, refer to bot h the block d iagram of Figure A-1 and the schematic diagrams at the rear of the manual. The t wo pr[...]

A-2 put is enclosed by a heavy line in Figure 3 of the operating section. If the operating point reaches the diagonal current limit line, a dec rease in load r esistance moves the op erating point down the line, reducing the out put voltage and current . Current foldback is controlled by a secon d operational ampli- fier (current comparison amplifi[...]

A-3 Operation V erification T ests The followin g tests assure that the power suppl y is per- formin g properl y . The y do not, however , check all the speci- fied parameters tested in the complete performance test described below . Proceed as follows: a. Perform turn-on checkout procedure g iven in pa g e 1-7. b. Perform the load re g ulation per[...]

A-4 Output Current Measurement. For accurate output current measurements, a current sampling resistor should be inserted between the load and the output of the supply . T o simplify grounding problems, one end of this sampli ng resistor shoul d be connected to the same output terminal of the supply which w ill be shorted to ground. An accurate vol [...]

A-5 Current Limit k. Disconnect all loads from the suppl y . l. Connect the test setup shown in Fi g ure A-5 to the +20- volt output. Substitute a short for R L and leave the load circuit switch open. m. Set the volta g e of the ± 20V supplies to 20 volts. n. Close the load switch and determine the current flow throu g h the current samplin g resi[...]

A-6 Peak-to-Peak Measurement The peak-t o-peak measurem ent is particularly i mportant for applications where noise spikes could be detrimental to a sensitive load, such as logic circuitry. T o measure the ripple and noise of the peak-to-peak value on each output supply output: a. Connect the test equipment across the output of the +20V supply as s[...]

A-7 St ability (Drift) Definiti on: The change in output voltage (dc to 20 Hz) for the first 8 hours following a 30-minute w arm-up period with con- stant input line voltage, constant load resistance and constant ambient tem perature. T o me asure the stability : a. Connect the test equipmen t across the output of the +20V supply as shown in Figure[...]

A-8 T a ble A -3 . Ini tial T robles hooting Procedu re STE P ACTION RESPONS E NEXT A CT ION 1 Check output voltage of +20V supply . a. Normal b. Zero volts c. Output voltage low er or higher than rat ing a. Proceed to step (2) . b. Check ac line fuse (F1). If blow n, proceed to "Open F use Troubleshooting" paragraph. If not blown, check [...]

A-9 Low outpu t voltage (lower t han rating) 1. Measure voltage at t he base of Q5. 2. Eliminate current limit circuit as a source of trouble by disc onnecting anode of CR1 1. 3. Measure voltage at pin 3 of U6. a. Measured voltage is less than 0 vol t. b. Measures voltage is more than 0 vol t. a. Out put voltage increas es. b. Out put voltage remai[...]

A-10 T able A-7. +6 V Su pply T r oubl eshooti ng SYMPTOM STEP - A CTION RE SPONSE P ROBA BLE CA USE The +20V supply must operat e properly before tr oubleshooting the -20V supply . High output voltage (higher than rat ing) 1. Atte mpt to turn of f Q1 by shorting emitt er-to-base of Q1. 2. Measure voltage at base of Q4. a. Outpu t voltage remains h[...]

A-11 A DJ USTMENT A ND CA LIBR A TION Current Limit Adjustme nt +6V S upply. T o adjust the current limit circuit in t he +6V sup- ply , proceed as follows: a. Check the setting of the current limit by performing steps (p) and (q) on page A-5. (Be sure to set the output voltage to 6 volts.) If reducing the load resistance permits the cur- rent to e[...]

A-12 REPL A C EA BLE P A RT S IN TRO DU CTI ON This section contains informat ion for ordering replacement parts. T able A-12 lists parts by reference designators and pro- vides the following information: a. Reference designators. Refer to T able A-10. b. Agilent T echnologies Part Number . c. T otal quantity us ed in that as sembly. d. Description[...]

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CERTIFICATION Agilent T ec hnologies c ertifies that this pr oduct m et its published s pecificat ions at time of sh ipmen t fro m t he fa ctor y . Agilent T ech nologies furt her cert ifies that its ca libration m easurem ents are trac eable t o the United St ate s Nat ional Ins titute of Stan- dards and T echnolo gy (form erly National Bure au of[...]

DECLA RA TION O F CONFORMITY accordi ng to ISO/IEC Guid e 22 and EN 4 5014 Manufactu rer’s Name: Agilent Techno logies, In c. Manufactu rer’s Address: 3 45-15, Kasa n-dong, Kum chon-ku, Seoul 15 3-023 Korea declares, that the produc ts Product Na me: DC Power Supply Model Numbers : E3630A Product Opt ions: Al l Options conforms to the follow in[...]